Objective： To explore the neuroprotective effects of electroacupuncture （EA） on hypoxic-ischemic encephalopathy （HIE） and to further investigate the role of glial cell line-derived neurotrophic factor （GDNF） fa...Objective： To explore the neuroprotective effects of electroacupuncture （EA） on hypoxic-ischemic encephalopathy （HIE） and to further investigate the role of glial cell line-derived neurotrophic factor （GDNF） family receptor member RET （rearranged during transfection） and its key downstream phosphatidylinositol 3 kinase （PI-3K）/protein kinase B （Akt） pathway in the process. Methods： A total of 220 seven-day-old SD rats （of either sex, from 22 broods） were randomly divided into two groups, one （30 rats） for sham-surgery group and the other （190 rats） for HIE model group. The HIE model was established using the left common carotid artery ligation method in combination with hypoxic treatment. The successfully established rats were randomly divided into five groups, including control model group, EA group, sham-EA group, antagonist group and antagonist plus electroacupuncture group, with 35 rats in each group. Baihui （GV 20）, Dazhui （GV 14）, Quchi （LI 11） and Yongquan （KI 1） acupoints were chosen for acupuncture. EA was performed at Baihui and Quchi for 10 min once a day for continuous 1, 3, 7 and 21 days, respectively. The rats were then killed after the operation and injured cerebral cortex was taken for the measurement of neurologic damage by hematoxylin-eosin （HE） staining and the degenerative changes of cortical ultrastructure by transmission electron microscopy. RET mRNA level and Akt protein level were detected by real-time reverse-transcription polymerase chain reaction （RT-PCR） and western blot analysis, respectively. Results： EA could ameliorate neurologic damage of the first somatic sensory area （SITr） and alleviate the degenerative changes of ultrastructure of cortical neurons in rats subjected to HIE. And the longer acupuncture treatment lasted, the better its therapeutic effect would be. This was accompanied by gradually increased expression of GDNF family receptor RET at the mRNA level and its downstream signaling Akt at the protein l展开更多
目的:观察电针对缺氧缺血性脑病模型大鼠GFRα1的干预作用。方法:7日龄SD乳鼠随机分成假手术组、模型组和电针组,每组又分为1、3、7、21 d 4个亚组,电镜观察缺氧缺血侧脑组织形态变化,RT-PCR方法检测GFRα1mRNA的表达。结果:电镜显示:2...目的:观察电针对缺氧缺血性脑病模型大鼠GFRα1的干预作用。方法:7日龄SD乳鼠随机分成假手术组、模型组和电针组,每组又分为1、3、7、21 d 4个亚组,电镜观察缺氧缺血侧脑组织形态变化,RT-PCR方法检测GFRα1mRNA的表达。结果:电镜显示:21 d电针组细胞核核膜模糊,核仁清晰,细胞质分布均匀,线粒体无肿胀,粗面内质网无扩张。GFRα1的表达电针组3、7、21 d与模型组比较,均表达增加,有统计学意义(P<0.05)。结论:电针能够促进GFRα1mRNA的表达,对缺氧缺血性脑损伤大鼠发挥较好的脑保护作用。展开更多
基金Supported by the 45th China Postdoctoral Science Foundation(No.20090450856)
文摘Objective： To explore the neuroprotective effects of electroacupuncture （EA） on hypoxic-ischemic encephalopathy （HIE） and to further investigate the role of glial cell line-derived neurotrophic factor （GDNF） family receptor member RET （rearranged during transfection） and its key downstream phosphatidylinositol 3 kinase （PI-3K）/protein kinase B （Akt） pathway in the process. Methods： A total of 220 seven-day-old SD rats （of either sex, from 22 broods） were randomly divided into two groups, one （30 rats） for sham-surgery group and the other （190 rats） for HIE model group. The HIE model was established using the left common carotid artery ligation method in combination with hypoxic treatment. The successfully established rats were randomly divided into five groups, including control model group, EA group, sham-EA group, antagonist group and antagonist plus electroacupuncture group, with 35 rats in each group. Baihui （GV 20）, Dazhui （GV 14）, Quchi （LI 11） and Yongquan （KI 1） acupoints were chosen for acupuncture. EA was performed at Baihui and Quchi for 10 min once a day for continuous 1, 3, 7 and 21 days, respectively. The rats were then killed after the operation and injured cerebral cortex was taken for the measurement of neurologic damage by hematoxylin-eosin （HE） staining and the degenerative changes of cortical ultrastructure by transmission electron microscopy. RET mRNA level and Akt protein level were detected by real-time reverse-transcription polymerase chain reaction （RT-PCR） and western blot analysis, respectively. Results： EA could ameliorate neurologic damage of the first somatic sensory area （SITr） and alleviate the degenerative changes of ultrastructure of cortical neurons in rats subjected to HIE. And the longer acupuncture treatment lasted, the better its therapeutic effect would be. This was accompanied by gradually increased expression of GDNF family receptor RET at the mRNA level and its downstream signaling Akt at the protein l
文摘目的:观察电针对缺氧缺血性脑病模型大鼠GFRα1的干预作用。方法:7日龄SD乳鼠随机分成假手术组、模型组和电针组,每组又分为1、3、7、21 d 4个亚组,电镜观察缺氧缺血侧脑组织形态变化,RT-PCR方法检测GFRα1mRNA的表达。结果:电镜显示:21 d电针组细胞核核膜模糊,核仁清晰,细胞质分布均匀,线粒体无肿胀,粗面内质网无扩张。GFRα1的表达电针组3、7、21 d与模型组比较,均表达增加,有统计学意义(P<0.05)。结论:电针能够促进GFRα1mRNA的表达,对缺氧缺血性脑损伤大鼠发挥较好的脑保护作用。
